JEE Math Practice Question
If a curve $$y=f(x)$$ passes through the point $$(1,-1)$$ and satisfies the differential equation, $$y(1+xy) dx=x$$ $$dy$$, then $$f\left( { - {1 \over 2}} \right)$$ is equal to :
- A.$${2 \over 5}$$
- B.$${4 \over 5}$$
- C.$$-{2 \over 5}$$
- D.$$-{4 \over 5}$$
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